Of course today is relevant. One problem as of today is that it is not practical to recharge an Australian EV with power from the UK. We typically use the grid power we have here today. Some of us may have a PV supply. Even a modest recharge of a large EV such as the Tesla with a 75 or 100kWh battery needs a very large PV array 10kW or more for even a half charge assuming it is at home all day.
Any EV in Australia primarily charged for the mains remains an expensive indulgence. That’s ok as we all indulge.
The UK does have a lower carbon grid, due to large scale generation from nuclear power and natural gas as well as renewables and coal.
Notably the UK has nearly halved it’s total equivalent CO2 green house gas emissions since 1990. Australia is a long way short of that level of performance. It has very little to do with EV’s although the UK did have electric milk carts long before Elon Musk put a battery in a car.